Complaint, women's trouble (4)
I believe the answer is:
wail
'complaint' is the definition.
(wail is a kind of complaint)
'women's trouble' is the wordplay.
'women' becomes 'w'.
'trouble' becomes 'ail' ('ail' can be a synonym of 'trouble'**).
'w'+'ail'='WAIL'
(Other definitions for wail that I've seen before include "Cry, moan" , "Howl" , "Lamentation" , "blub" , "Lament noisily" .)